Ruling · Gopāṣṭamī (Goṣṭhāṣṭamī) · 2009

Monday 26 October

Determinatein Daqing, under the Rashtriya Panchang method. Clear of every threshold by 454 minutes.

Decide it for

46°35′ N 125°00′ E · Asia/Shanghai · GeoNames 2037860

The two middays

One ghaṭī is 24 minutes. Madhyāhna is 1 ghaṭikā either side of midday.

Midday of Sunday 25 October

Aṣṭamī is absent from madhyāhna. Not taken.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

0 of 48 minutes covered

Midday of Monday 26 October

Taken. The only midday Aṣṭamī reaches.

madhyāhna begins 11:00  11:48 madhyāhna ends
10:1210:3611:0011:2411:4812:1212:36

48 of 48 minutes covered

Aṣṭamī presentMadhyāhna, the window the rule readsThe instant the tithi begins or ends

How it was decided

  1. 01

    Aṅga

    Aṣṭamī runs from 19:22 on Sun 25 Oct to 22:02 on Mon 26 Oct.

    2009-10-25T11:22:05Z → 2009-10-26T14:01:59Z

  2. 02

    Kāla

    Madhyāhna is 1 ghaṭikā either side of midday: 11:00–11:48 on the 25th, 11:00–11:48 on the 26th.

    madhyahna: midday-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′

  3. 03

    Rule

    Aṣṭamī must be present during madhyāhna. It covers 0 of 48 minutes on the 25th and 48 of 48 on the 26th.

    Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104

  4. 04

    Tie-break

    Only one midday qualifies. No tie-break is needed.

    priority: unstated → only-day · margin 27259 s

  5. 05

    Ruling

    Gopāṣṭamī, Daqing, 2009: Monday 26 October.

    confidence: determinate

Say it like this

In Daqing, Gopāṣṭamī 2009 falls on Monday 26 October. Aṣṭamī runs from 19:22 on Sun 25 Oct to 22:02 on Mon 26 Oct and covers all of madhyāhna that midday.

ahargana.org/daqing/festivals/2009/gopashtami · pac-rp@2026.1

Who says what

AuthorityKindDate
Ahargaṇa, pac-rpThis rulingMon 26 Oct
Ahargaṇa, classicalDisc centre, no refractionMon 26 Oct
compat-drikpanchangComparison profileMon 26 Oct
No institution has a recorded ruling for Daqing.

Institutional rulings are recorded with a source address, and are never edited to agree.

The rule, as data

/rules/gopashtami · ruleset 2026.3-draft

Month
Kārtika, amānta
Pakṣa · aṅga
Śukla · Aṣṭamī
Kāla
Madhyāhna
Priority
Unstated
Tie-break
Longer coverage, as a boundary
Reference
CRC 1955, p. 104

“S 8 Gopastami, Gosthastami.” Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 104.

The same rule, elsewhere

Twelve places, west to east. Local clock times.

PlaceAṣṭamīMadhyāhna 25thCoveredMadhyāhna 26thCoveredRuled
Los Angeles04:22 → 07:0212:1348 min12:130 min25 Oct
Chicago06:22 → 09:0212:1048 min12:100 min25 Oct
Jersey City07:22 → 10:0212:1648 min12:160 min25 Oct
Port of Spain07:22 → 10:0211:2648 min11:260 min25 Oct
London11:22 → 14:0211:2046 min11:2048 min26 Oct
Durban13:22 → 16:0211:160 min11:1648 min26 Oct
Dubai15:22 → 18:0211:390 min11:3948 min26 Oct
Delhi16:52 → 19:3211:410 min11:4148 min26 Oct
Kolkata16:52 → 19:3210:570 min10:5648 min26 Oct
Singapore19:22 → 22:0212:250 min12:2548 min26 Oct
Sydney22:22 → 01:0212:160 min12:1548 min26 Oct
Suva23:22 → 02:0211:270 min11:2648 min26 Oct
Profile · tradition
pac-rp@2026.1 · smarta
Rule
gopashtami@2026.3-draft
Engine · kernel
0.1.0 · de440 7eef…ea74
Boundary margin
300 s

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